Re: iMac G3 IPv6 issue

[Aurélien GÉRÔME]

On Sun, Sep 12, 2004 at 06:57:31PM +0100, David Woodhouse wrote:
> On Sun, 2004-09-12 at 15:39 +0200, Aurélien GÉRÔME wrote:
> > I put IPv6 support, but the console is flooded by a lot of:
> > hw tcp v6 csum failed
> > However, IPv6 works, and IPv4 packets do not have this kind of issue.
> > The network card is a Sun Gem. It is kind of weird to see bad packets.
> 
> I use the sungem in a similar machine with IPv6, and haven't seen any
> problems. Can you tcpdump from a different machine on the network and
> confirm whether these reported bad checksums really are happening or if
> it's the fault of the hardware/driver?

I have 2 machines on the same switch and an IPv6 ssh connection between
them.

"tcpdump -a -i eth0 -v" on both machines shows [tcp sum ok].

The ssh link is an IPv6 one, arwen is the faulty machine, and aragorn a
sane one.

arwen has also a ppp0 interface, no infamous [bad tcp cksum ....!]
appears, on lo interface too. All is reported [tcp sum ok].

But during this time, the kernel keeps flooding the console with these
"hw tcp v6 csum failed"...

Moreover, like I said, the IPv6 networking works fine.

In that case, is it the driver fault?

I wonder if it is possible to print the checksum and the interface with
the LIMIT_NETDEBUG(printk(KERN_DEBUG "hw tcp v6 csum failed\n"));.

Bests.
-- 
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